1. ICP 12/18/12 Review of Chemical Reactions

2. Warmup For 1-4 write endothermic or exothermic: 1)Gives off heat 2)Takes in heat 3)Reactants + heat  Products 4)Reactants  Products + heat

3. Which type of reaction is it? 1)___ NaBr + ___ H 3 PO 4  ___ Na 3 PO 4 + ___ HBr 2)____ C 2 H 4 + ____ O 2  ____ CO 2 + ____ H 2 O 3)____ PbSO 4  ____ PbSO 3 + ____ O 2 4)____ H 2 O + ____ SO 3  ____ H 2 SO 4 5)____ Mg + ____ Fe 2 O 3  ____ Fe + ____ MgO

4. Balance each reaction. 1)___ NaBr + ___ H 3 PO 4  ___ Na 3 PO 4 + ___ HBr 2)____ C 2 H 4 + ____ O 2  ____ CO 2 + ____ H 2 O 3)____ PbSO 4  ____ PbSO 3 + ____ O 2 4)____ H 2 O + ____ SO 3  ____ H 2 SO 4 5)____ Mg + ____ Fe 2 O 3  ____ Fe + ____ MgO

5. Extra information in a chemical reaction: (l) – liquid (s) – solid (g) – gas (aq) – aqueous (something dissolved in water)

6. Other information: Why do we balance chemical equations? – In order to make chemical reactions obey the Law of Conservation of Mass How many dots in an electron dot diagram? – This is based on what column an element is in on the periodic table.

7. Time to work on Study Guide Study guide is due on Thursday (day of the test).